Flora of North America species comparison

(10)30-50(70) cm, glabrous, smooth.

4-30 cm, usually erect, sometimes semi-prostrate, glabrous, smooth.

closed for about 1/2 their length, glabrous, smooth or scabrous distally, persistent;

collars glabrous;

ligules shorter than 0.3 mm;

blades 0.3-0.7(1.2) mm in diameter, conduplicate, abaxial surfaces smooth or scabrous, adaxial surfaces scabrous, veins 5-7(9), ribs 1-3, indistinct;

abaxial sclerenchyma usually a continuous band;

adaxial sclerenchyma absent.

closed for about 1/2 their length, glabrous, persistent;

collars glabrous;

ligules 0.1-0.3 mm;

blades (0.2)0.3-0.4(0.6) mm in diameter, conduplicate, lax, abaxial surfaces glabrous, adaxial surfaces sparsely scabrous to puberulent, veins 3-5, ribs 1-3;

abaxial sclerenchyma in 3-5 small strands, less than twice as wide as high;

adaxial sclerenchyma absent.

(2)5-10(12) cm, contracted, with 1-2(3) branches per node;

branches usually erect, sometimes spreading at anthesis, lower branches with 2+ spikelets.

1-4(5) cm, contracted, with 1-2 branches per node;

branches erect, lower branches with 2+ spikelets.

4-6(7.3) mm, with 3-6(8) florets.

(2.5)3-5 mm, with (1)2-3(5) florets.

exceeded by the upper florets, lanceolate to ovate-lanceolate, mostly smooth and glabrous, sometimes scabrous distally;

lower glumes 1-2(3) mm;

upper glumes (2.2)2.6-4(4.6) mm;

lemmas (2.6)3-4(5) mm, ovate-lanceolate, mostly smooth, sometimes scabrous or hispid near the apices, awns 0.5-2 mm, terminal, sometimes absent;

paleas about equal to the lemmas, intercostal region puberulent distally;

anthers (1.4)2-2.6 mm;

ovary apices glabrous.

exceeded by the upper florets, ovate to ovate-lanceolate, sparsely scabrous distally;

lower glumes 1.3-2.5 mm;

upper glumes 2-3.5 mm;

lemmas (2)2.2-3.5(4) mm, ovate-lanceolate, sparsely scabrous near the apices, apices abruptly acuminate, awns 0.5-1.5(1.7) mm;

paleas about as long as or slightly shorter than the lemmas, intercostal region scabrous distally;

anthers (0.4)0.6-1.2 mm;

ovary apices usually with a few hairs, rarely glabrous.

leaf blades 0.7-3.5 cm.

= 14, 28.

= 28.